sources of light

Question 1

luminous

Answer 1

roduces its own light

Question 2

non-luminous

Answer 2

does not produce its own light; can only be seen by using reflected light

Question 3

incandescence

Answer 3

production of light as a result of high temperature
90% heat, 10% ight

Question 4

lights from electrical discharge

Answer 4

producing light by the build up and quick transfer of electrons between two objects
the process of producing light by an electric current flowing through gas - electrons are excited

Question 5

luminescence

Answer 5

light generated without heating the object
the energy used to excite the atoms comes from a variety of sources

Question 6

fluorescence

Answer 6

when an object absorbs uv light and immediately releases the energy as visible light
laudry detergents use this as well as highlighters

Question 7

phosphorescence

Answer 7

the excited atmos store energy absorbed from uv radiation which is slowly released as visible light

Question 8

chemiluminescence

Answer 8

light that is generated by energy released in a chemical reaction without a rise in temperature